Mark said Julianne's remark "uncalled for"

Mark Ballas lashed out at Julianne Hough for her remarks as a judge on DWTS Monday night. Now, sources are saying the pro dancer is "furious" at Hough's critiquing comments.

On Monday night's episode of Dancing With the Stars, former show dancer Julianne Hough gave Mark Ballas a somewhat demeaning judging commentary. After slamming her remark to reporters after the show backstage, insiders claim Ballas got very upset about what she said.

"Mark was so pissed after his routine, he was in silence, just gritting his teeth for a long time," a source told Us Weekly magazine. Hough served as a judge to fill in for Len Goodman on Monday's show and when she critiqued Mark's routine with his partner Christina Milian, she made a snide remark about his style.

"I really want to see [Christina] shine. I've danced with Mark," Hough said to Milian, insinuating Ballas wanted the spotlight all to himself. "You have to stand in front to make sure you're seen."

Ballas took enormous offense to that inference and got extremely upset. "He was so angry. Julianne is like his little sister he grew up with, and for her to make that dig at him... he felt like that was just uncalled for," the source added.

Apparently, Ballas and his family trained Hough and her older brother, fellow DWTS pro Derek Hough, in London when they were kids. They all grew up as family and have always been close. So Hough's putdown of Ballas, even with a lighthearted comment, made her fellow dancer "furious," the source said.

In efforts to calm his friend down, Derek tried to make light of the situation, but Ballas wasn't very receptive.

"Mark kind of laughed off the remark when Derek said something to him about it," the source continued. "But you could tell he was just angry and didn't want to talk about it. He kind of brushed it off."

When speaking to Us reporters after the show aired, Ballas addressed the younger Hough's remark and said: "The one comment for me that was a little funny is that I make it all about me... all the critiques were at me, and not at [my partner Milian]." He then added, "So, I thought that was a little hypocritical comment."